1) Once you have an account established and are following people it is mostly fine, but it's hard to browse the global feed without seeing strongly undesirable content such as lolicon (or worse). This is a natural consequence of being censorship-resistant, but it will scare new users away. I'm excited to see how this can be reigned in without harming the free speech of other users.

2) By "centralized development", I just mean any standard unifying practice for development. Centralizing a core Nostr codebase under GPL would keep it property of the people forever, while making sure all bugs and weaknesses are patched for everyone. Everyone doing things their own way is a recipe for disaster. Death by a thousand cuts.

3) I have never used Damus, so nothing I've uncovered is specific to them. Finding a weakness in Nostr means every affected Nostr project needs to fix it independently. Even I don't want to write that many bug tickets.